HaShem continued to give Moshe detailed instructions for the special service of his brother Aharon, the Kohen Gadol. “No one but Aharon may ever enter the Kodesh HaKadashim. And even Aharon is permitted to enter only on Yom Kippur, and only 4 times on that day. He should follow my exact instructions. First of all, Aharon should not wear all of his 8 special garments when he goes into the Kodesh HaKadashim. Instead, he should wear only the 4 that are pure, white linen, without any gold ornaments.”
That’s because the gold might give a reason for the accusing angel to say to HaShem, “Gold! Just like the calf they made of gold! That’s why they call it “The Golden Calf.” Remember their sin?”
Also, let’s not forget, white symbolizes purity and forgiveness, just like holy angels, and these are the qualities Bnei Yisrael hope to bring out on such a holy day.
The Kohen Gadol changed his clothes 5 times, from 4 garments to 8 garments, over the course of the Yom Kippur day, each time purifying himself by immersing in a Mikveh (special pool of water), and washing his hands and feet before and after each dip.
HaShem taught Moshe the details of the Kohen Gadol’s Yom Kippur service, which included offerings of Ketores (incense), a lottery, and two goats – one goat brought as a sacrifice and the other, called the scapegoat, sent into the desert – in addition to all of the usual daily sacrifices.
The Kohen Gadol also recited a beautiful prayer on behalf of all Bnei Yisrael, “Please, HaShem, send rain and sun in the proper amounts this year, so that food will grow in abundance and there will be plenty of food.”